Single-phase Na1.0TiO2: solid-state synthesis and characterisation by high-resolution powder diffraction

1996 ◽  
pp. 409 ◽  
Author(s):  
S. J. Clarke ◽  
A. C. Duggan ◽  
A. J. Fowkes ◽  
A. Harrison ◽  
R. M. Ibberson ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Powder Diffraction ◽  
Single Phase ◽  
Solid State Synthesis

ChemInform Abstract: Single-Phase Na1.0TiO2: Solid-State Synthesis and Characterization by High-Resolution Powder Diffraction.

ChemInform ◽  
2010 ◽  
Vol 27 (22) ◽  
pp. no-no
Author(s):  
S. J. CLARKE ◽  
A. C. DUGGAN ◽  
A. J. FOWKES ◽  
A. HARRISON ◽  
R. M. IBBERSON ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Powder Diffraction ◽  
Single Phase ◽  
Solid State Synthesis ◽  
Synthesis And Characterization

Solid-State Structures of Base-Free Rubidium and Cesium Pentamethylcyclopentadienides. Determination by High-Resolution Powder Diffraction

2008 ◽  
Vol 27 (20) ◽  
pp. 5398-5400 ◽  
Author(s):  
Ulrich Behrens ◽  
Robert E. Dinnebier ◽  
Swen Neander ◽  
Falk Olbrich
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Powder Diffraction ◽  
Solid State Structures

scholarly journals The crystal chemistry and electrical properties of Fe doped Ca12Al14O33 (Mayenite)

2021 ◽  
Vol 40 (4) ◽  
pp. 591-597
Author(s):  
S.N. Ude ◽  
C.J. Rawn ◽  
T.T. Meek
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Crystal Chemistry ◽  
Powder Diffraction ◽  
Synthesis Method ◽  
Neutron Powder Diffraction ◽  
Solid State Synthesis ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Phase Pure

X-ray and neutron powder diffraction have been used to study the crystal chemistry of Fe doped mayenite (Ca12Al14-xFexO33). Solid- state synthesis was used to prepare Ca12Al14-xFexO33 where x = 0, 0.1, 0.2, 0.5 and 0.6 and the citrate gel route was used to prepare Ca12Al14-xFexO33 where x = 0, 0.05, 0.1, 0.2, 0.3 and 0.4. X-ray powder diffraction data indicate that samples with the same composition but synthesized by the citrate gel route were more likely to be phase pure than samples obtained by traditional solid-state synthesis. The refined lattice parameters were observed to increase with increasing Fe concentration, irrespective of the synthesis method. Refined neutron powder data confirm that Fe is going into Al site rather than Ca site. A 2-point probe was used to measure the electrical properties of the Fe doped citrate gel synthesized samples and showed that the resistivity increases for the Fe doped samples compared to the undoped mayenite.

Solid-State Synthesis of New Diimide Compounds: A Two-Step Reaction Followed by X-ray Powder Diffraction

2008 ◽  
Vol 8 (4) ◽  
pp. 1147-1153 ◽  
Author(s):  
Antonia Neels ◽  
Déborah González Mantero ◽  
Helen Stoeckli-Evans
Keyword(s):  
Solid State ◽  
Powder Diffraction ◽  
Solid State Synthesis ◽  
X Ray

Decaphenylferrocene

1995 ◽  
Vol 48 (4) ◽  
pp. 851 ◽  
Author(s):  
LD Field ◽  
TW Hambley ◽  
PA Humphrey ◽  
CM Lindall ◽  
GJ Gainsford ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Vibrational Spectroscopy ◽  
Powder Diffraction ◽  
Photoelectron Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
57Fe Mössbauer Spectroscopy ◽  
X Ray ◽  
57Fe Mössbauer ◽  
57Fe Mossbauer Spectroscopy

Decaphenylferrocene was obtained as an extremely insoluble, maroon microcrystalline solid by heating [(η5-C5Ph5)((η6-C6H5)C5Ph4)Fe], and was characterized by 57Fe Mossbauer spectroscopy, X-ray photoelectron spectroscopy, mass, electronic and vibrational spectroscopy, solid-state 13C n.m.r. spectroscopy and high-resolution X-ray powder diffraction, which showed it to be isostructural with decaphenylnickelocene.

scholarly journals NMR crystallography driven structure determination

2014 ◽  
Vol 70 (a1) ◽  
pp. C1517-C1517
Author(s):  
Charlotte Martineau ◽  
Boris Bouchevreau ◽  
Francis Taulelle
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Powder Diffraction ◽  
Structure Determination ◽  
Pulse Sequences ◽  
Local Order ◽  
Oh Groups ◽  
Nmr Data ◽  
Wide Range ◽  
Hybrid Solids

Because solid-state nuclear magnetic resonance (ss-NMR) spectroscopy is sensitive to local order and is selective to the nature of the atoms, this technique has emerged as ideally complementary to powder diffraction for structure determination of a wide range of solids. Here, we will illustrate with the example of hybrid solids (aluminophosphates) the role of high-resolution one and two-dimensional solid-state NMR data to drive the search for a structure model from powder diffraction data. Great progresses have been made in the field of ss-NMR in the past few years (higher magnetic field, more robust pulse sequences, etc.) that now allows access to NMR spectra with very high resolution in such compounds [1]. From these NMR data, information about the cations (number, coordination number, etc) and the connectivity between the cation polyhedra are readily available. Such knowledge allows performing a more constraint structure search, thus increasing the chance to obtain a solution [2]. NMR data further provide information about the non-periodic sub-networks in hybrid compounds (water molecules, OH groups, templates...), allowing to draw very detailed pictures of the solids [3].

Preparation of Forsterite by Solid State Synthesis Process and its Dielectric Properties

2012 ◽  
Vol 534 ◽  
pp. 110-113 ◽  
Author(s):  
Fei Shi ◽  
Peng Cheng Du ◽  
Jing Xiao Liu ◽  
Ji Wei Wu ◽  
Chun Yuan Luo
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Single Phase ◽  
Raw Materials ◽  
Magnesium Carbonate ◽  
Solid State Synthesis ◽  
Molar Ratio ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
X Ray

Using basic magnesium carbonate (Mg(OH)2•4MgCO3•6H2O) and SiO2 as raw materials, forsterite (Mg2SiO4) was prepared by solid state synthesis process. The optimal process for synthesizing Mg2SiO4 was obtained by adjusting Mg/Si molar ratio and sintering temperature. The crystal phase of the obtained Mg2SiO4 powder was determined by X-ray diffraction (XRD). The results indicate that the single-phase Mg2SiO4 powder can be obtained when the mixtures with Mg/Si molar ratio of 2.05～2.01 were sintered at 1350°C for 3h in the air. The as-prepared Mg2SiO4 ceramic samples which were sintered at 1300～1360°C showed better dielectric properties with εr=7.4 and tanδ =7.5×10-4.

Combustion syntheses for BaTi4O9 and PbxBa1–x Ti4O9

1996 ◽  
Vol 11 (1) ◽  
pp. 162-168 ◽  
Author(s):  
Zhimin Zhong ◽  
Patrick K. Gallagher
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Aqueous Solutions ◽  
Combustion Synthesis ◽  
Spray Drying ◽  
Single Phase ◽  
Metastable Phases ◽  
Solid State Synthesis ◽  
Synthesis Process ◽  
Spray Dried

BaTi4O9 and PbxBa1−x Ti4O9, where x is 0.1, 0.2, 0.3, 0.4, or 0.5, have been prepared by a combustion synthesis process. The process starts with spray drying aqueous solutions of Pb(NO3)2, Ba(NO3)2, TiO(NO3)2, and β-alanine with appropriate ratios. Combustion reactions occur when heating the spray-dried products to 300 °C, which convert them to BaTi4O9 and PbxBa1−xTi4O9 directly. PbxBa1−xTi4O9 (x ≧ 0.1) are low temperature, metastable phases and have not been reported before. Pb0.5Ba0.5Ti4O9 is unstable above 800 °C and cannot be sintered. All PbxBa1−xTi4O9 compositions will decompose by 1300 °C, the temperature for solid state synthesis of BaTi4O9. Single-phase PbxBa1−xTi4O9 (x = 0.1, 0.2, 0.3, 0.4), however, have been sintered at relatively lower temperatures.

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